Sharp ER-A770 Service Manual Page 44
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2-8. VGA controller (MN89303A)
1) Pin Configuration
2) Block diagram
1
XIN
2
GND
3
AEN
4
/SBEH
5
/IOWR
6
/IORD
7
/SMEMW
8
/SMEMR
9
A21
10
A20
11
SA19
12
13
SA17
14
SA16
15
SA15
16
SA14
17
SA13
18
SA12
19
SA11
20
SA10
21
SA9
22
SA8
23
SA7
24
SA6
25
SA5
26
SA4
27
SA3
28
SA2
29
SA1
30
SA0
31
32
128
XO
127
126
MINTEST
125
TEST
124
RESET
123
VDD
122
GND
121
MD0
120
MD1
119
MD2
118
MD3
117
MD4
116
MD5
115
MD6
114
MD7
113
MD8
112
MD9
111
VDD
110
GND
109
MD10
108
MD11
107
MD12
106
MD13
105
MD14
104
MD15
103
/WE
102
/LCAS
101
/UCAS
100
/RAS
99
VDD
98
GND
97
MA0
33
GND
34
VDD
35
SD15
36
SD14
37
SD13
38
SD12
39
GND
40
SD11
41
SD10
42
SD9
43
VDD
44
SD8
45
SD7
46
SD6
47
GND
48
SD5
49
SD4
50
SD3
51
SD2
52
SD1
53
SD0
54
GND
55
VDD
56
IOCHRDY
57
/MEMCS16
58
/IOCS16
59
GND
60
VDD
61
DCLK
62
DISP
63
LP
64
FP
GND
SA18
/BIOSEN
/REFRESH
96
MA1
95
MA2
94
MA3
93
MA4
92
MA5
91
MA6
90
MA7
89
MA8
88
MA9
87
VDD
86
GND
85
84
LCDON
83
BACKON
82
LD0
81
LD1
80
LD2
79
LD3
78
LD4
77
LD5
76
LD6
75
LD7
74
VDD
73
GND
72
UD0
71
UD1
70
UD2
69
UD3
68
UD4
67
UD5
66
65
LOGICON
UD6
UD7
1
XIN
RESET
TEST/MINTEST
124
126/125
ADDRESS[21:0]
3
LCD panel
controller
UD[7:0]
LD[7:0]
BACKON
LCDON
83
FO
DISP
DCLK
LOGICON
84
85
63
64
62
LP
61
SD[15:0]
AEN
SBHE
IOWR
IORD
SMEMW
SMEMR
IOCHRDY
REFRESH
MEMCS16
IOCS16
4
5
6
7
8
56
32
57
58
Host
interface
LCD/CRT
controller
Gray scale
engine
Memory
write
buffer
RAM table
Hardware
cursor
Attributer
Video FIFO
Mmory
interface
Access
attributer
Graphics
controller
MA[9:0]
MD[15:0]
RAS
UCAS
LCAS
WE
BIOSEN
100
101
102
103
31
- SERVICE MANUAL 1
- CHAPTER 1. SPECIFICATION 2
- 3. Display 4
- CHAPTER 2. OPTIONS 5
- ER-A770 bus connector 7
- CHAPTER 3. SERVICE PRECAUTION 8
- IPL from IR 10
- Connected 115200 10
- 21 22 23 24 25 26 27 28 10
- SENDING 00000 11
- 4. Note for handling of LCD 12
- 6. Others 12
- SRV. reset 13
- MRS-1 Key 14
- Symbol/PartsCod) 15
- MRS-3 Key 16
- ENTER PASSWORD 16
- 1. General 17
- 2. System configuration 17
- 3. Diagnostics 17
- 3-2. RAM Diagnostics 18
- UP-P02MB2 Check 19
- Error Address xxxxxxH 19
- Write Data xxxxH 19
- Read Data xxxxH 19
- 3-5. RS232 I/F Diagnostics 20
- RS232 CH1 Check 21
- ER-DR : ERROR!! 21
- Rear Display Check 23
- • Satellite machine setting 24
- • Master machine setting 25
- Magnetic Card Reader Check 26
- TRACK1:BUFFER EMPTY 26
- TRACK1:MCR ERROR 26
- TRACK2:BUFFER EMPTY 26
- TRACK2:MCR ERROR 26
- 1. Hardware block diagram 27
- 2) Block diagram 29
- 3) Pin description 30
- 2-2. G.A.(MPCA8) 31
- 2-3. OPC2 35
- 1) Features 38
- 2) Pin configuration 38
- 3) General description 39
- 4) Pin description 39
- 2) General description 39
- 3) Pin configuration 40
- 4) Functional description 40
- 5) Pin description 40
- DMA CONTROLLER 41
- 1) FEATURES 41
- 2-7. MB62H149 42
- 1) Pin Configuration 44
- 2-9. CKDC9 (HD404728B02FS) 46
- (MAX4MB) 48
- 4. LCD display 49
- 5. Customer display 49
- 6. Pseudo SRAM (Standard) 50
- 7. NOR-type flash memory 50
- 8. SSP control 50
- 9. Interrupt control 50
- 10. WAIT control 51
- 11. CKDC9 51
- 12. Option RAM interface 51
- 13. Reset sequence 52
- 14. Drawer 52
- 16. RS232 53
- CHAPTER 8. CIRCUIT DIAGRAM 54
- FLASH ROM 56
- ODD SIDE 57
- EVEN SIDE 57
- +24V/+5V POWER CIRCUIT 65
- DC-DC CNV CIRCUIT 66
- CONNECTOR 67
- 2. CKDC PWB 68
- 3. INVERTOR PWB 70
- 4. N/F PWB 71
- 2. Main PWB (Side-B) 73
- 3. Mother PWB 74
- 4. CKDC PWB 74
- 5. Inverter PWB 75
- 6. Noise filter PWB 75
- PARTS GUIDE 76
- 1 Top cabinet etc 77
- 2 Bottom cabinet etc 79
- 4 Main PWB unit 81
- 5 Mother PWB unit 84
- 6 CKDC PWB unit 84
- 7 NF PWB unit 85
- 8 Inverter PWB unit 85
- 9 Service tools 85
- 10 Supply 85
- PARTS CODE NO 86
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